Aeration type photobioreactor and method of use thereof

Abstract

The invention relates to the field of microalgae cultivation engineering, in particular to an aeration type optical bioreactor for cultivating microalgae and a method for applying the same. The bioreactor comprises an annular wading pool, a liquid inlet main pipe, an annular liquid replenishing pipe, an atomization nozzle, a hot water pipe coil, an air inlet main pipe, an annular air inlet trunk pipe, an air distribution branch pipe and an aeration device. The bioreactor is characterized in that density difference between microbubbles generated by the aeration device through aeration and peripheral algae liquid promotes the floating of the microbubbles and the declining of the algae liquid; countless gas liquid generated by the annular wading pool circulates and flows up and down so that the upper layer and the lower layer of the algae liquid are mixed; the floating of the bubbles strengthens desorption of dissolved oxygen in the algae liquid; oxygen is taken to the liquid level by the bubbles and is released; and carbon dioxide gas is aerated and simultaneously dissolved in the algae liquid to provide a carbon source for the growth of the microalgae. The invention combines the advantages of an open type optical bioreactor and a closed type optical bioreactor to form a novel closed type optical bioreactor which can use the carbon dioxide gas as the carbon source and cultivate the microalgae in low cost and large scale.

Description

[technical field] [0001] The invention relates to the field of microalgae cultivation engineering, in particular to an aeration type photobioreactor for cultivating microalgae and an application method thereof. [Background technique] [0002] Microalgae can effectively utilize light energy, carbon dioxide, and inorganic salts to synthesize fats, proteins, polysaccharides, and a variety of high-value-added biologically active substances. With the continuous deepening of human understanding of microalgae, the development and development of new high-efficiency photobioreactors and their cultivation methods have become an important part of microalgae bioengineering technology. [0003] At present, there are mainly two types of photobioreactors for microalgae cultivation: open and closed. There are four main types of open photobioreactors: shallow pools, circulating pools, runway pools, and ponds. Among them, the most typical and commonly used open pool culture system is the ra...

AI Technical Summary

Problems solved by technology

[0004] Existing closed photobioreactors are more or less likely to cause various problems such as dissolved oxygen accumulation, algae sticking to the wall, insufficient supply of carbon dioxide during high-density cultivation, flow dead ends, and expensive equipment. In addition to pipeline reactors, They are basically at the laboratory scale, with a volume of no more than 1 cubic meter

Although the current reported annual output of the pipeline photobioreactor has reached hundreds of tons of algae powder, the equipment cost and maintenance cost are very high, and it is difficult to popularize.

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